/usr/lib/libc.a(signal.o): In function `signal':
/usr/src/lib/libc/gen/signal.c:(.text+0x0): multiple definition of `signal'
/usr/lib/libroken.a(signal.o):/usr/src/kerberos5/lib/libroken/../../../crypto/heimdal/lib/roken/signal.c:(.text+0x0): first defined here
cc: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error code 1
Apparently, libc and libroken can't be both linked statically. I recommend linking at least libc (and libthr and librt if you use them) dynamically. Another reason for this is that external NSS modules only work with dynamic linking of libc.
If you can modify the application's source code, changing it to use sigaction() instead of signal() may help. Note that libroken's signal enables SA_RESTART for all signals except SIGALRM.
Libc could avoid this problem by moving the definition of the _sigintr variable to its own file.